Improved kochng-chaib



JAMES LAMB, OF HUBBARDSTOWN, MASSACHUSETTS Letters Patent No. 74,920, daled February 25, 1868.

nrtPRovEn ROGKING-GHAIR.

@In rlgihillt numb tu in tigesc gt-Uns xltnit mit milking pint nf tige sante.

TO ALL PERSONS TO WHOM THESE PRESENTS MAY COME:

Be it known that I, JAMES LAMB, of Hubbnrdstown, inthe county oi' Worcester,` and Stute of Massachusetts, here umd@ n new :Ind useful invention having reference to Chairs; und v(lo hereby declare the sume to be fully described in the following specification, and represented in the accompanying drawings, of which- Figure I1 is n. side elevation, Y

Figure 2 :L front view, and

Figure 3 a verticnl section of n. chnir lundi.- in nceordnnee with my invention.

The invention is an improvement in supporting the sent on the buse of the ehziir, so that the sent, by :1 new.

son while sitting upon it, muy be vibrnted or tilted back nndforth as well ns laterally with n pleasant motion.

The base-portion A of' the chair is seperate from the rest of the ehuir, und consists of zt framel to rest directly upon a floor. -I usunlly construct it of two cheeks or foot-bnrs, a a, :xndtwe connection-bmsb b, and I extend from the middle oF one to thnt ofthe other of suoli bars (1bn bur spring-supporter, c. On this supporter l elevate and festen two zigzng springs B B, formed ats represented-infigs. nud 3. Their upper levers I aliix to :t bar or cleat, il, fnstened to the lower side of the chair-sent C. There project downward from the sent four short-llegs, e c e e, which rest on :ind are fastened to two side springs D D, arranged directly over the cheeks or foot-'bars a a. Each spring, D,'a.t its' middle, is hinged to the upper pnrt of' n staple, E, extended up from the cheek or foot-har, the wholebeing as represented in figs. l and 2. The arrangement of the zigzag springs, with reference to the staples, should be ns shown in the snid figures. The chair, while `tilting on the staples, will be supported both by the zigzngsprings and the side springs, the lutter allowing it nlso to tilt or tip more or less laterally. Thus, the choirV is not confined to :t tilting motion in one plane only, but, by my errungement and combination of springs, may be tilted in various directions. Furthermore-the zigzag springs nre peculiarly favorable for the vibrntory movements of' the chair-sent, :tud ure very much better thun helical or spiral springs for such use.

I claim the arrangement :rs woll ns thecolnbinntiozi of the middle or zigzag and the side or leafwith the chair-sent and buse, suhstnntinlly as described, the whole being to opernte ns explained.

JAMES LAMB.

springs Witnesses:

R. H. EDDY, F. l. HALE, Jr. 

